Constant Volume Amplifier (CB26275E)

This circuit is from a 1990s publication by William Sheets. The circuit consists of a stage whose gain is adjusted according to the signal intensity.

| Clique na imagem para ampliar |

Outlet test (CB7952E)
Found in a PE Hobbyst Handbook, this circuit checks if there is voltage in a power outlet by...
Intercom Using Electret (CB16273E)
Here is a high-quality intercom for demanding readers. The circuit is from a 1982 documentation. Of course,...
Power Control with Reed Switch (CB468)
This circuit shows how to use a low current read switch to control high power loads. The circuit...